MD82 Posted 5 hours ago Posted 5 hours ago When going word for word over the Standby Power Test, some checklist items do not conform to what is seen on the panel; 1. With Battery OFF and STBY PWR ON, ESS BUS FAIL lights are ON and STBY BUS FAIL lights are OFF. (Reverse on checklist) 2. When checking STBY DC BUS, there is an Amp load across the bus (Checklist mentions 0 Amps) I believe the 2 items in point 1. are reversed. Looking at the panel electrical flow diagram, it is logical that the STBY bus is powered but not the ESS.. As for point 2., I don't know the system well enough, however in most cases when current is placed on a bus, there usually is some load associated as there will be items on that bus that are powered by default.
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